Elevating machinery.



SSHEETS-SHEETZ.

Patented Aug. 26

0. E. LEYDA ELEVATING MACHINERY.

AIPLIGATION FILED MAR. 6. 1913.

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APPLICATION FILED mums, 1913.

1 071 ,247, Patented Aug. 26, 1913.

3 SHEETS-SHEET 3.

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ITED STATES PATENT FFIOE- CHARLES E. LEYDA, PITTSBURGH, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO LEE LLEWELLYN, OF PITTSBURGH, PENNSYLVANIA.

ELEVA'IYING MACHINERY.

Specification of Letters intent.

Application filed March 6, 1913. Serial No. 752,410.

To all whom it may concern:

Be it known that 1, CHARLES E. LnYoA, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Elevating Machinery, of which the following is a specification.

My invention relates to hoisting machinery for handling granular material such as coal, coke, iron ore, stone, etc.

The objects of my invention are :1st. To weigh and record the material hoisted, 2nd. To prevent overfilling of the buckets 3rd. To render the apparatus automatic, so

- that as long as material is supplied it will be hoisted, and conversely the buckets will wait automatically until filled.

To these ends my invention comprises the various parts arranged and correlated as shown on the acco panying drawings in which Figurel is a side elevation of my com plete apparn Fig. 2 is a front elevation of the same. Fig. 3 is a side elevation of the automatic gate and the operating mechanism therefor. Fig. 4 is a front elevation of the same.

Referring to the drawings the bin 1 is supplied with coal in any convenient way, and is provided with a discharge chute 2, which is controlled by a gate'3.

' An elevated storage bin 4 of any desired capacity, is supplied from bin 1 by a double skip hoist, comprising the hoisting buckets 5, the 8, etc. The ropes 8 are operated from a pair, of drums 9 upon a shaft 10, mounted in suitably supported bearings 11. The ropes 8 and the drums 9 are in efiect a single rope, and drum, and may be so constructed. The shaft 10 is preferably'drii en by an electric motor through suitable gearing, (not shown) such arrangements being well known in the art. Each rope 8 passes over a sheave 12, mounted on a short shaft 13, rotating in bearings 14, the latter being supported by the overhung end of a tilting beam 15. The'beam 15 is hinged on a shaft or pin l6,'sup.ported by the beam 17, and is provided with a counterbalance 18, and the limit stop 19, which engages thepiu'QQ, the latter being secured to the beam 17. Thereis a beam 15 for each bucket 5. but for the sake of clcurucss only one will be described.

guide rails 6, and 7 the hoisting ropes.

When the bucket 5 is empty the beam 15 sets level as shown, but when the bucket is full the right end of the beam and the sheave 12 drop about 4 to 6. This tiltmg motion of the beam is used to shut oil the flow of coal by closing the gate 3, and further to start the motor driving the drums 9 as follows -A tiller roper 21 is fastened to the beam 15 and led over the small sheaves 22 and 23, and down along the rail 7, and to the lower end of the rope 91 there is hung a weight 24, which is freely movable vertically in the guides 25. A slot 2 1 in the weight 24 incloses the end of a horizoutal lever 26, which is pivotally connected by a pin 27 to a vertical lever 28, the latter being in turn pivoted to a stationary member 29 by a pin 30. The gate 3 is hinged to the chute 2, by the pin 31, and is provided with a downwardly extending arm 32, which carries a projecting pin 33, en gageable by the hook 34. on the lever 26. The lever 28 is provided with an arm 35 which carries a counterweight 36. he bucket 5 is provided with a wedge shaped cam 37', which engages a roller 38 mounted on thelower end of the lever 28. The weight 24 carries'a projecting arm 39, which operates a spring 40, to which is connected the switch member 41, this latter part controlling an electric circuit through the wires 42 and 43. The wires 42 and 43 may be led to a magnetic controller of the usual kind which starts the hoisting motor.

In operation the wedge 37 on the downcoming bucket 5 strikes the roller 38, and opens the gate 3; the parts then being in the position shown in Figs. 1 and it no material flows out of chute 3 to till the bucket the parts remain in. this position indefinitely. As material flows out of chute 3 the pull on rope 8 gradually increases until it is suiticient to tilt the beam 15. which allows the bucket 5 to drop a few inches. When the beam 15 tilts, the tiller rope 21 lifts the weight 2 1, which operates the lever 26, to

depress the hook 34, and release the roller 33; this action allows the gate 3 to close by gravity thus cutting off the supply of material: at the same time the tiller rope 21 operates the switch member 41, and starts the motor driving the hoisting drums 9. The loaded bucket then rises and the empty bucket descends, the hoist motor being preferably controlled automatically by a controller of a type such as is commonly used for electric elevators and which need not be specifically described here.

The apparatus herein shown serves merely to start the hoist motor; the control of the same, and the stopping of the h0isting action being under control of any suitable automatic arrangement.

Each weight 24 operates a switch 41, both switches having the efiect. of starting the motor, but in the opposite direction. Each downcoming bucket opens the gate 3 of its chute 2, (there being two chutes 2) waits until it is completely filled, closes the gate 3, and then starts the hoist motor, so that the operation is completely automatic and the apparatus can run for long periods without attention. A counter or register 50 may be operated to each bucket so that the weight of each full bucket being known, the total tonnage handled in any given time may be easily ascertained.

The register 50 may be secured to, the guide rail 7 and operated by a forked lever 51 pivoted to a bracket 52 and connected to the register 50 by a link 53; the whole arranged so that as the bucket is dumped it raises the end of the lever 51 and operates the register.

As previously described and shown there are two buckets, the dead weight of each balancing that of the other. The starting of the hoist motor is controlled alternately by the buckets when being filled.

In case only a single bucket is employed the operation would be the same for the filling of the bucket, the tilting of the beam 15, the closing of the ate 3, and the starting of the hoist motor; Imt an additional device would be provided to start the v bucket to descend, or this could be efiected manually.

Various changes in the design and details of construction may be made by those skilled in the art without departin from the scope of my invention as covered by the following claims.

I claim as my invention 5- 1. In elevating machinery, a hoisting bucket, an unbalanced tilting beam, a sheave thereon, a motor, a rope connecting said bucket with said motor and passing over said sheave, and means operated by the motion of said beam for starting the motor.

2. In elevating machinery, a supply chute,

a hoisting bucket supplied from said chute, an unbalanced tilting beam, a sheave thereon, a rope connected to said bucket and passing over said sheave, and means operated by the motion of said beam for closing said gate.

3. In elevating machinery, a supply chute, a gate therefor, a hoisting bucket supplied from said chute, a motor, an unbalanced tilting beam, a sheave thereon, a hoisting rope connecting said bucket and said motor and passing over said sheave, a: tiller rope connected to said tilting beam and moving therewith, means operated by said tiller rope for starting said motor to lift the bucket and means operated by said tiller rope for closing said gate to shut off the supply of material.

4:. In elevating machinery, a hoisting bucket, a motor, a rope connecting said motor and said bucket to operate the latter, an unbalanced pivoted beam, weights on one end of said beam, and a sheave at the other end of said beam, said rope passing over said sheave, and the whole arranged to support the empty bucket at one level and to drop it a certain distance when a predetermined weight of material has been placed therein. I

5. A double skip hoist comprising-a pair of independent unbalanced tilting, beams, one end of each of which support a bucket, a motor, a rope connected to each of the buckets and to the motor, a starting and reversing device for the motor, means connecting said device with one of the tilting beams to start the motor in one direction and means connected with the other of said tilting beams to start the motor in the reverse direction.

6. A skip hoist comprising in combination a bucket an unbalanced tilting beam one end of which supports the weight of the bucket, a motor connected to the bucket, means operated by the tilting of the beam for starting the motor to hoist the bucket, and means for varying the load at which the beam will tilt.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

CHAS. E. LEYDA.

a gate therefor,

Witnesses:

LEE LLEWELLYN, M. B. REMENSNYDER. 

